## Monday, 17 September 2012

### GROUP 1

Combined events are two or more events occurring at the same time or one after the other.

One example is:

There are 6 possible die outcomes each having a further 2 coin outcomes, giving a combined outcome of 12 possibilities. Therefore the probability of throwing a six and 'heads' is one outcome in twelve: . If the problem was changed to the possibility of throwing an odd number and 'tails', the table will show that this may occur 3 times, (1 tails, 3 tails, 5 tails) out of twelve outcomes, and therefore the probability is reduces to 312, or .

Another example is:
In a drawer, there are some white socks and some black socks. Tim takes out one sock and then a second. Draw a tree diagram to show the possible outcomes.

Example 10 Solution:

1. When you gave the example with the table, you did not describe the scenario first, so it is confusing and harder to understand. Am i correct in saying that the scenario is: Tossing 1 coin and 1 die at the same time?

2. The examples don't really seem to show what a combined event is, only showing how to calculate probability.

3. Good Examples and Diagrams But so does the 2 tosses have to be the sam thing like a 2 coins or can it be two different things. Because having 2 different things will change the fairness of the experiment.

4. Kind of confusing this is. Maybe you can elaborate moar?

5. Well done! Good description which helps me understand combined events. A different example may work better.

6. What is the first table about? please state the scenario and you could explain what are combined events and how arethe examples given is an example of combined events?

7. For the table, you need to have the another top row and another row on the left and list out the stuff before showing the results like the first picture.

8. Maybe you could elaborate on how you formed the table

9. Needs an elaboration on the first table however generally very detailed

10. What was the scenario like in the first example? The probabilities are shown but are the coins thrown at the same time?

11. Chin Wai Kit9/18/2012 10:39 am

You could have explained your own example so as to allow us to understand better

12. The explanation is quite good but it would help if it was explained in the context of the example given.

13. What was the scenario in the first given example? Maybe you have stated that.